#!/usr/bin/env python
#
# Copyright 2016 - The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
r"""
Welcome to
   ___  _______   ____  __  _____
  / _ |/ ___/ /  / __ \/ / / / _ \
 / __ / /__/ /__/ /_/ / /_/ / // /
/_/ |_\___/____/\____/\____/____/


This a tool to create Android Virtual Devices locally/remotely.

- Prerequisites:
 The manual will be available at
 https://android.googlesource.com/platform/tools/acloud/+/master/README.md

- To get started:
 - Create instances:
    1) To create a remote cuttlefish instance with the local built image.
       Example:
       $ acloud create --local-image
       Or specify built image dir:
       $ acloud create --local-image /tmp/image_dir
    2) To create a local cuttlefish instance using the image which has been
       built out in your workspace.
       Example:
       $ acloud create --local-instance --local-image

 - Delete instances:
   $ acloud delete

Try $acloud [cmd] --help for further details.

"""

from __future__ import print_function
import argparse
import logging
import platform
import sys
import traceback

# TODO: Remove this once we switch over to embedded launcher.
# Exit out if python version is < 2.7.13 due to b/120883119.
if (sys.version_info.major == 2
        and sys.version_info.minor == 7
        and sys.version_info.micro < 13):
    print("Acloud requires python version 2.7.13+ (currently @ %d.%d.%d)" %
          (sys.version_info.major, sys.version_info.minor,
           sys.version_info.micro))
    print("Update your 2.7 python with:")
    # pylint: disable=invalid-name
    os_type = platform.system().lower()
    if os_type == "linux":
        print("  apt-get install python2.7")
    elif os_type == "darwin":
        print("  brew install python@2 (and then follow instructions at "
              "https://docs.python-guide.org/starting/install/osx/)")
        print("  - or -")
        print("  POSIXLY_CORRECT=1 port -N install python27")
    sys.exit(1)

# By Default silence root logger's stream handler since 3p lib may initial
# root logger no matter what level we're using. The acloud logger behavior will
# be defined in _SetupLogging(). This also could workaround to get rid of below
# oauth2client warning:
# 'No handlers could be found for logger "oauth2client.contrib.multistore_file'
DEFAULT_STREAM_HANDLER = logging.StreamHandler()
DEFAULT_STREAM_HANDLER.setLevel(logging.CRITICAL)
logging.getLogger().addHandler(DEFAULT_STREAM_HANDLER)

# pylint: disable=wrong-import-position
from acloud import errors
from acloud.create import create
from acloud.create import create_args
from acloud.delete import delete
from acloud.delete import delete_args
from acloud.internal import constants
from acloud.reconnect import reconnect
from acloud.reconnect import reconnect_args
from acloud.list import list as list_instances
from acloud.list import list_args
from acloud.metrics import metrics
from acloud.public import acloud_common
from acloud.public import config
from acloud.public import device_driver
from acloud.public.actions import create_cuttlefish_action
from acloud.public.actions import create_goldfish_action
from acloud.setup import setup
from acloud.setup import setup_args

LOGGING_FMT = "%(asctime)s |%(levelname)s| %(module)s:%(lineno)s| %(message)s"
ACLOUD_LOGGER = "acloud"

# Commands
CMD_CREATE_CUTTLEFISH = "create_cf"
CMD_CREATE_GOLDFISH = "create_gf"
CMD_CLEANUP = "cleanup"


# pylint: disable=too-many-statements
def _ParseArgs(args):
    """Parse args.

    Args:
        args: Argument list passed from main.

    Returns:
        Parsed args.
    """
    usage = ",".join([
        setup_args.CMD_SETUP,
        create_args.CMD_CREATE,
        list_args.CMD_LIST,
        delete_args.CMD_DELETE,
        reconnect_args.CMD_RECONNECT,
    ])
    parser = argparse.ArgumentParser(
        description=__doc__,
        formatter_class=argparse.RawDescriptionHelpFormatter,
        usage="acloud {" + usage + "} ...")
    subparsers = parser.add_subparsers(metavar="{" + usage + "}")
    subparser_list = []

    # Command "create_cf", create cuttlefish instances
    create_cf_parser = subparsers.add_parser(CMD_CREATE_CUTTLEFISH)
    create_cf_parser.required = False
    create_cf_parser.set_defaults(which=CMD_CREATE_CUTTLEFISH)
    create_cf_parser.add_argument(
        "--branch",
        type=str,
        dest="branch",
        help="Android branch, e.g. git_master")
    create_cf_parser.add_argument(
        "--kernel_build_id",
        "--kernel-build-id",
        type=str,
        dest="kernel_build_id",
        required=False,
        help="Android kernel build id, e.g. 4586590. This is to test a new"
        " kernel build with a particular Android build (--build_id). If neither"
        " kernel_branch nor kernel_build_id are specified, the kernel that's"
        " bundled with the Android build would be used.")
    create_cf_parser.add_argument(
        "--kernel_branch",
        "--kernel-branch",
        type=str,
        dest="kernel_branch",
        required=False,
        help="Android kernel build branch name, e.g."
        " kernel-common-android-4.14. This is to test a new kernel build with a"
        " particular Android build (--build-id). If specified without"
        " specifying kernel_build_id, the last green build in the branch will"
        " be used. If neither kernel_branch nor kernel_build_id are specified,"
        " the kernel that's bundled with the Android build would be used.")
    create_cf_parser.add_argument(
        "--system_branch",
        type=str,
        dest="system_branch",
        help="Branch to consume the system image (system.img) from, will "
        "default to what is defined by --branch. "
        "That feature allows to (automatically) test various combinations "
        "of vendor.img (CF, e.g.) and system images (GSI, e.g.). ",
        required=False)
    create_cf_parser.add_argument(
        "--system_build_id",
        type=str,
        dest="system_build_id",
        help="System image build id, e.g. 2145099, P2804227",
        required=False)
    create_cf_parser.add_argument(
        "--system_build_target",
        type=str,
        dest="system_build_target",
        help="System image build target, specify if different from "
        "--build_target",
        required=False)

    create_args.AddCommonCreateArgs(create_cf_parser)
    subparser_list.append(create_cf_parser)

    # Command "create_gf", create goldfish instances
    # In order to create a goldfish device we need the following parameters:
    # 1. The emulator build we wish to use, this is the binary that emulates
    #    an android device. See go/emu-dev for more
    # 2. A system-image. This is the android release we wish to run on the
    #    emulated hardware.
    create_gf_parser = subparsers.add_parser(CMD_CREATE_GOLDFISH)
    create_gf_parser.required = False
    create_gf_parser.set_defaults(which=CMD_CREATE_GOLDFISH)
    create_gf_parser.add_argument(
        "--branch",
        type=str,
        dest="branch",
        help="Android branch, e.g. git_master")
    create_gf_parser.add_argument(
        "--emulator_build_id",
        type=str,
        dest="emulator_build_id",
        required=False,
        help="Emulator build used to run the images. e.g. 4669466.")
    create_gf_parser.add_argument(
        "--gpu",
        type=str,
        dest="gpu",
        required=False,
        default=None,
        help="GPU accelerator to use if any."
        " e.g. nvidia-tesla-k80, omit to use swiftshader")
    create_gf_parser.add_argument(
        "--base_image",
        type=str,
        dest="base_image",
        required=False,
        help="Name of the goldfish base image to be used to create the instance. "
        "This will override stable_goldfish_host_image_name from config. "
        "e.g. emu-dev-cts-061118")
    create_gf_parser.add_argument(
        "--tags",
        dest="tags",
        nargs="*",
        required=False,
        default=None,
        help="Tags to be set on to the created instance. e.g. https-server.")

    create_args.AddCommonCreateArgs(create_gf_parser)
    subparser_list.append(create_gf_parser)

    # Command "cleanup"
    cleanup_parser = subparsers.add_parser(CMD_CLEANUP)
    cleanup_parser.required = False
    cleanup_parser.set_defaults(which=CMD_CLEANUP)
    cleanup_parser.add_argument(
        "--expiration_mins",
        type=int,
        dest="expiration_mins",
        required=True,
        help="Garbage collect all gce instances, gce images, cached disk "
        "images that are older than |expiration_mins|.")
    subparser_list.append(cleanup_parser)

    # Command "create"
    subparser_list.append(create_args.GetCreateArgParser(subparsers))

    # Command "setup"
    subparser_list.append(setup_args.GetSetupArgParser(subparsers))

    # Command "delete"
    subparser_list.append(delete_args.GetDeleteArgParser(subparsers))

    # Command "list"
    subparser_list.append(list_args.GetListArgParser(subparsers))

    # Command "Reconnect"
    subparser_list.append(reconnect_args.GetReconnectArgParser(subparsers))

    # Add common arguments.
    for subparser in subparser_list:
        acloud_common.AddCommonArguments(subparser)

    return parser.parse_args(args)


# pylint: disable=too-many-branches
def _VerifyArgs(parsed_args):
    """Verify args.

    Args:
        parsed_args: Parsed args.

    Raises:
        errors.CommandArgError: If args are invalid.
    """
    if parsed_args.which == create_args.CMD_CREATE:
        create_args.VerifyArgs(parsed_args)
    if parsed_args.which == CMD_CREATE_CUTTLEFISH:
        if not parsed_args.build_id or not parsed_args.build_target:
            raise errors.CommandArgError(
                "Must specify --build_id and --build_target")
    if parsed_args.which == CMD_CREATE_GOLDFISH:
        if not parsed_args.emulator_build_id and not parsed_args.build_id:
            raise errors.CommandArgError("Must specify either "
                                         "--emulator_build_id or --build_id")
        if not parsed_args.build_target:
            raise errors.CommandArgError("Must specify --build_target")

    if parsed_args.which in [
            create_args.CMD_CREATE, CMD_CREATE_CUTTLEFISH, CMD_CREATE_GOLDFISH
    ]:
        if (parsed_args.serial_log_file
                and not parsed_args.serial_log_file.endswith(".tar.gz")):
            raise errors.CommandArgError(
                "--serial_log_file must ends with .tar.gz")
        if (parsed_args.logcat_file
                and not parsed_args.logcat_file.endswith(".tar.gz")):
            raise errors.CommandArgError(
                "--logcat_file must ends with .tar.gz")


def _SetupLogging(log_file, verbose):
    """Setup logging.

    This function define the logging policy in below manners.
    - without -v , -vv ,--log_file:
    Only display critical log and print() message on screen.

    - with -v:
    Display INFO log and set StreamHandler to acloud parent logger to turn on
    ONLY acloud modules logging.(silence all 3p libraries)

    - with -vv:
    Display INFO/DEBUG log and set StreamHandler to root logger to turn on all
    acloud modules and 3p libraries logging.

    - with --log_file.
    Dump logs to FileHandler with DEBUG level.

    Args:
        log_file: String, if not None, dump the log to log file.
        verbose: Int, if verbose = 1(-v), log at INFO level and turn on
                 logging on libraries to a StreamHandler.
                 If verbose = 2(-vv), log at DEBUG level and turn on logging on
                 all libraries and 3rd party libraries to a StreamHandler.
    """
    # Define logging level and hierarchy by verbosity.
    shandler_level = None
    logger = None
    if verbose == 0:
        shandler_level = logging.CRITICAL
        logger = logging.getLogger(ACLOUD_LOGGER)
    elif verbose == 1:
        shandler_level = logging.INFO
        logger = logging.getLogger(ACLOUD_LOGGER)
    elif verbose > 1:
        shandler_level = logging.DEBUG
        logger = logging.getLogger()

    # Add StreamHandler by default.
    shandler = logging.StreamHandler()
    shandler.setFormatter(logging.Formatter(LOGGING_FMT))
    shandler.setLevel(shandler_level)
    logger.addHandler(shandler)
    # Set the default level to DEBUG, the other handlers will handle
    # their own levels via the args supplied (-v and --log_file).
    logger.setLevel(logging.DEBUG)

    # Add FileHandler if log_file is provided.
    if log_file:
        fhandler = logging.FileHandler(filename=log_file)
        fhandler.setFormatter(logging.Formatter(LOGGING_FMT))
        fhandler.setLevel(logging.DEBUG)
        logger.addHandler(fhandler)


def main(argv=None):
    """Main entry.

    Args:
        argv: A list of system arguments.

    Returns:
        0 if success. None-zero if fails.
    """
    if argv is None:
        argv = sys.argv[1:]

    args = _ParseArgs(argv)
    _SetupLogging(args.log_file, args.verbose)
    _VerifyArgs(args)

    cfg = config.GetAcloudConfig(args)
    # TODO: Move this check into the functions it is actually needed.
    # Check access.
    # device_driver.CheckAccess(cfg)

    report = None
    if args.which == create_args.CMD_CREATE:
        create.Run(args)
    elif args.which == CMD_CREATE_CUTTLEFISH:
        report = create_cuttlefish_action.CreateDevices(
            cfg=cfg,
            build_target=args.build_target,
            build_id=args.build_id,
            kernel_build_id=args.kernel_build_id,
            kernel_branch=args.kernel_branch,
            system_branch=args.system_branch,
            system_build_id=args.system_build_id,
            system_build_target=args.system_build_target,
            num=args.num,
            serial_log_file=args.serial_log_file,
            logcat_file=args.logcat_file,
            autoconnect=args.autoconnect,
            report_internal_ip=args.report_internal_ip)
    elif args.which == CMD_CREATE_GOLDFISH:
        report = create_goldfish_action.CreateDevices(
            cfg=cfg,
            build_target=args.build_target,
            build_id=args.build_id,
            emulator_build_id=args.emulator_build_id,
            gpu=args.gpu,
            num=args.num,
            serial_log_file=args.serial_log_file,
            logcat_file=args.logcat_file,
            autoconnect=args.autoconnect,
            branch=args.branch,
            tags=args.tags,
            report_internal_ip=args.report_internal_ip)
    elif args.which == delete_args.CMD_DELETE:
        report = delete.Run(args)
    elif args.which == CMD_CLEANUP:
        report = device_driver.Cleanup(cfg, args.expiration_mins)
    elif args.which == list_args.CMD_LIST:
        list_instances.Run(args)
    elif args.which == reconnect_args.CMD_RECONNECT:
        reconnect.Run(args)
    elif args.which == setup_args.CMD_SETUP:
        setup.Run(args)
    else:
        sys.stderr.write("Invalid command %s" % args.which)
        return 2

    if report and args.report_file:
        report.Dump(args.report_file)
        if report.errors:
            msg = "\n".join(report.errors)
            sys.stderr.write("Encountered the following errors:\n%s\n" % msg)
            return 1
    return 0


if __name__ == "__main__":
    EXIT_CODE = None
    EXCEPTION_STACKTRACE = None
    EXCEPTION_LOG = None
    metrics.LogUsage(sys.argv[1:])
    try:
        EXIT_CODE = main(sys.argv[1:])
    except Exception as e:
        EXIT_CODE = constants.EXIT_BY_ERROR
        EXCEPTION_STACKTRACE = traceback.format_exc()
        EXCEPTION_LOG = str(e)
        raise
    finally:
        # Log Exit event here to calculate the consuming time.
        metrics.LogExitEvent(EXIT_CODE,
                             stacktrace=EXCEPTION_STACKTRACE,
                             logs=EXCEPTION_LOG)